package day03;

public class IfDemo {
    public static void main(String[] args) {
        double price=300.0;
        if (price>=500){
            price*=0.8;

        }
        System.out.println("最终结算金额:"+price);

        //
        double score=555;
        if (score>=0 && score<=100){
            System.out.println(score+"是合法成绩");
        }else {
            System.out.println(score+"是不合法成绩");
        }

    }
}
